1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
use crate::{use_locales_with_options, UseLocalesOptions};
use leptos::{logging::warn, prelude::*};
use unic_langid::LanguageIdentifier;
/// Reactive locale matching.
///
/// Returns the first matching locale given by [`fn@crate::use_locales`] that is also found in
/// the `supported` list. In case there is no match, then the first locale in `supported` will be
/// returned.
///
/// > If `supported` is empty, this function will panic!
///
/// Matching is done by using the [`fn@unic_langid::LanguageIdentifier::matches`] method.
///
/// ## Demo
///
/// [Link to Demo](https://github.com/Synphonyte/leptos-use/tree/main/examples/use_locale)
///
/// ## Usage
///
/// ```
/// # use leptos::*;
/// # use leptos_use::use_locale;
/// use unic_langid::langid_slice;
/// #
/// # #[component]
/// # fn Demo() -> impl IntoView {
/// let locale = use_locale(langid_slice!["en", "de", "fr"]);
/// #
/// # view! { }
/// # }
/// ```
///
/// ## Server-Side Rendering
///
/// See [`fn@crate::use_locales`]
pub fn use_locale<S>(supported: S) -> Signal<LanguageIdentifier>
where
S: IntoIterator,
S::Item: AsRef<LanguageIdentifier>,
{
use_locale_with_options(supported, UseLocaleOptions::default())
}
/// Version of [`fn@crate::use_locale`] that takes a `UseLocaleOptions`. See [`fn@crate::use_locale`] for how to use.
pub fn use_locale_with_options<S>(
supported: S,
options: UseLocaleOptions,
) -> Signal<LanguageIdentifier>
where
S: IntoIterator,
S::Item: AsRef<LanguageIdentifier>,
{
let client_locales = use_locales_with_options(options);
let supported = supported
.into_iter()
.map(|l| l.as_ref().clone())
.collect::<Vec<_>>();
const EMPTY_ERR_MSG: &str = "Empty supported list. You have to provide at least one locale in the `supported` parameter";
assert!(!supported.is_empty(), "{}", EMPTY_ERR_MSG);
Signal::derive(move || {
client_locales.with(|client_locales| {
let mut supported_iter = supported.iter().peekable();
// Checked it's not empty above.
let first_supported = *supported_iter.peek().unwrap();
for client_locale in client_locales {
let supported_iter = supported_iter.clone();
for s in supported_iter {
let client_locale = client_locale.parse::<LanguageIdentifier>();
if let Ok(client_locale) = client_locale {
if client_locale.matches(s, true, true) {
return (*s).clone();
}
} else {
warn!("Received an invalid LanguageIdentifier")
}
}
}
(*first_supported).clone()
})
})
}
pub type UseLocaleOptions = UseLocalesOptions;